228912920 has 32 divisors (see below), whose sum is σ = 523789200. Its totient is φ = 90012288.

The previous prime is 228912917. The next prime is 228912941. The reversal of 228912920 is 29219822.

It is a super-2 number, since 2×228912920² = 104802249885852800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46139 + ... + 50858.

Almost surely, 2^228912920 is an apocalyptic number.

228912920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228912920 is an abundant number, since it is smaller than the sum of its proper divisors (294876280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228912920 is a wasteful number, since it uses less digits than its factorization.

228912920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97067 (or 97063 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 228912920 is about 15129.8684726603. The cubic root of 228912920 is about 611.7257589125.

The spelling of 228912920 in words is "two hundred twenty-eight million, nine hundred twelve thousand, nine hundred twenty".